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                <blockquote>
<p>甚是想念大三上学期学单片机的日子，虽然室友觉得很难，没学进去，但是我还是觉得很有意思的。之前学了51单片机，跟着正点原子学stm32，理解很更改代码完成了课程要求的任务。自己动手将avr单片mega16板子零件什么的焊接再一起，并且用这个使用串口通信和esp8266相连。还有RFID的实验，理论没听懂什么，实践用的VB也是搞不来，自己准备使用arduino连接自己买的mfrc1602也没有反应。还有就是华清远见的指纹识别模块，虽然是跟着老师一步一步的做的，使用了QT。但是我还是很怀恋那几天，大家坐满了那个机房，那个场景，那样的画面。</p>
</blockquote>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210112109.png"></p>
<ul>
<li>小灯闪烁代码</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">while (1)
{
		//延时500ms
HAL_Delay(500);
//输出低电平
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_RESET);
HAL_Delay(500);
//输出高电平
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_SET);
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>单个按键控制开关<pre class="line-numbers language-none"><code class="language-none">	unsigned char lstate = 0xFFH;
 while (1)
  {
		if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET)
		{
			while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET);
			lstate=~lstate;
  }
		if(lstate==0xFFH)
		{
			HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_SET);
		}
  /* USER CODE END 3 */
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>


</li>
</ul>
<h4 id="按键实验"><a href="#按键实验" class="headerlink" title="按键实验"></a>按键实验</h4><ul>
<li>KEY3连接GND和PB0，KEY2连接GND和PB1</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210112829.png"></p>
<ul>
<li>设置为上拉输入，默认为高电平，检测低电平</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210113259.png"></p>
<blockquote>
<p>D6默认亮，KEY3控制D6点亮，KEY2控制LED熄灭</p>
</blockquote>
<pre class="line-numbers language-none"><code class="language-none">while (1)
{
  /* USER CODE END WHILE */
	//key3 up
	if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET){
	while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET);
	HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_SET);
	
}
	
	if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1)==GPIO_PIN_RESET){
	while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1)==GPIO_PIN_RESET);
	HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_RESET);
	
}

  /* USER CODE BEGIN 3 */
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h4 id="蜂鸣器实验"><a href="#蜂鸣器实验" class="headerlink" title="蜂鸣器实验"></a>蜂鸣器实验</h4><ul>
<li>蜂鸣器连接PA0</li>
<li>实验代码</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">int my5t = 5;
while (1)
 {
   /* USER CODE END WHILE */
		//key3 up
		if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET){
		while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET);
		myt++;
		
	}
		
		if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1)==GPIO_PIN_RESET){
		while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1)==GPIO_PIN_RESET);
		myt--;
		
	}
	HAL_Delay(myt);
	HAL_GPIO_WritePin(GPIOA,GPIO_PIN_0,GPIO_PIN_RESET);
	HAL_Delay(myt);
	HAL_GPIO_WritePin(GPIOA,GPIO_PIN_0,GPIO_PIN_SET);
   /* USER CODE BEGIN 3 */
 }<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>控制蜂鸣器开关</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">int myt = 5;
int fstate = 0;
while (1)
 {
   /* USER CODE END WHILE */
		//key3 up
		if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET){
		while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)==GPIO_PIN_RESET);
		fstate = 1;
		
	}
		
		if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1)==GPIO_PIN_RESET){
		while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1)==GPIO_PIN_RESET);
		fstate = 0;
		
	}
		
	if(fstate == 1)
	{
	HAL_Delay(myt);
	HAL_GPIO_WritePin(GPIOA,GPIO_PIN_0,GPIO_PIN_RESET);
	HAL_Delay(myt);
	HAL_GPIO_WritePin(GPIOA,GPIO_PIN_0,GPIO_PIN_SET);
	}
   /* USER CODE BEGIN 3 */
 }<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>212上课</p>
<h4 id="脉冲输出调制实验"><a href="#脉冲输出调制实验" class="headerlink" title="脉冲输出调制实验"></a>脉冲输出调制实验</h4><p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210154205.png"></p>
<ul>
<li>Prescaler：分屏系数</li>
<li>Count Mode：向上或者向下计数</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210154541.png"></p>
<h5 id="生成代码后修改代码"><a href="#生成代码后修改代码" class="headerlink" title="生成代码后修改代码"></a>生成代码后修改代码</h5><ul>
<li>修改初始化函数，在mian函数之上</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">/* TIM2 init function */
void BEEP_TIM2_Init(uint32_t period,uint32_t pluse)
{
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};

  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 48;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = period;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_PWM_Init(&amp;htim2) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&amp;htim2, &amp;sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = pluse;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&amp;htim2, &amp;sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  HAL_TIM_MspPostInit(&amp;htim2);

}
/* USER CODE END 0 */<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>修改main函数中的原函数</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">while (1)
{
  /* USER CODE END WHILE */
	BEEP_TIM2_Init(629,314);//设置计数值和比较值
  /* USER CODE BEGIN 3 */
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>


<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210163209.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201210163150.png"></p>
<ul>
<li>蜂鸣器发声和节拍</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">while (1)
{
  /* USER CODE END WHILE */
	BEEP_TIM2_Init(629,314);
HAL_TIM_PWM_Start(&amp;htim2,TIM_CHANNEL_1);
HAL_Delay(200);
HAL_TIM_PWM_Stop(&amp;htim2,TI_CHANNEL_1);
HAL_Delay(200);
  /* USER CODE BEGIN 3 */
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>音调频率</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">/*?1-7*/
		629,314,//Do 1
		561,281,//Re 2
		500,250,//Mi 3
		473,236,//Fa 4
		421,210,//SO 5
		375,188,//La 6
		334,167,//Si 7

		/*?1-7*/
		315,158,//Do 8 1
		281,141,//Re 9 2
		250,125,//Mi a 3
		236,118,//Fa b 4
		210,105,//So c 5
		187, 94,//La d 6
		167, 84,//Si e 7<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h4 id="串口收发数据"><a href="#串口收发数据" class="headerlink" title="串口收发数据"></a>串口收发数据</h4><ul>
<li>代码</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">uint8_t TxData[10]= "01234abcde";
HAL_UART_Transmit(&amp;huart1,TxData,10,0xffff);
uint8_t TxData2[10];
 while (1)
 {
   /* USER CODE END WHILE */
	HAL_UART_Receive(&amp;huart1,TxData2,10,0xffff);
   /* USER CODE BEGIN 3 */
	HAL_UART_Transmit(&amp;huart1,TxData2,10,0xffff);
 }<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h2 id="第二天"><a href="#第二天" class="headerlink" title="第二天"></a>第二天</h2><ul>
<li>利用函数来封装代码</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/BTDWU361GSLXCYTOM3P@%7D$4.jpg"></p>
<ul>
<li>串口发送数据</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/52KJ907FX0VG%ZOZ8UAU@35.jpg"></p>
<ul>
<li>串口控制收发</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">HAL_StatusTypeDef status;
uint8_t rxBuffer[32] = {0};
 while (1)
 {
	status = HAL_UART_Receive(&amp;huart1,rxBuffer,5,0xfff);
	if(status == HAL_OK)
	{
		HAL_UART_Transmit(&amp;huart1,rxBuffer,5,0xfff);
	}
 }<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>收发控制led()</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">HAL_StatusTypeDef status;
uint8_t rxBuffer[32] = {0};
 while (1)
 {
	status = HAL_UART_Receive(&amp;huart1,rxBuffer,5,0xfff);
	if(status == HAL_OK)
	{
		HAL_UART_Transmit(&amp;huart1,rxBuffer,5,0xfff);
		if(rxBuffer[0]=='o')
		{
			HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_RESET);
						HAL_UART_Transmit(&amp;huart1,(uint8_t *)"lec on",5,0xfff);
		}
		if(rxBuffer[0]=='c')
		{
			HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_SET);
			HAL_UART_Transmit(&amp;huart1,(uint8_t *)"lec off",5,0xfff);
		}
	}
 }<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/EGBLNI%YIEATCB~%7BJ9%602V_J.jpg"></p>
<ul>
<li>printf输出</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">#include "stdio.h"

/* USER CODE BEGIN 0 */
int fputc(int ch,FILE *fp)
{
   HAL_UART_Transmit(&amp;huart1,(uint8_t *)&amp;ch,1,HAL_MAX_DELAY);
   return EOF;
}
/* USER CODE END 0 */



	HAL_StatusTypeDef status;
	uint8_t command;
  while (1)
  {

		status = HAL_UART_Receive(&amp;huart1,&amp;command,1,0xfff);
		if(status == HAL_OK)
		{
			HAL_UART_Transmit(&amp;huart1,&amp;command,1,0xfff);
			HAL_Delay(5);
			printf("s");
			HAL_Delay(5);
			if(command=='o')
			{
				HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_RESET);
			}
			else if(command=='c')
			{
				HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2,GPIO_PIN_SET);
			}
		}
  }<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h4 id="Qt创建工程和导入图片"><a href="#Qt创建工程和导入图片" class="headerlink" title="Qt创建工程和导入图片"></a>Qt创建工程和导入图片</h4><ul>
<li>新建项目</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154226.png"></p>
<ul>
<li>不能有中文</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154415.png"></p>
<ul>
<li>目录介绍</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154438.png"></p>
<ul>
<li>添加图片文件</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154525.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154548.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154607.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154631.png"></p>
<ul>
<li>成功</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211154650.png"></p>
<h4 id="给程序添加背景"><a href="#给程序添加背景" class="headerlink" title="给程序添加背景"></a>给程序添加背景</h4><p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211161026.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211161049.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211161114.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211161132.png"></p>
<ul>
<li>可以移除这三个选项</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211161203.png"></p>
<h4 id="配置标签和串口设置"><a href="#配置标签和串口设置" class="headerlink" title="配置标签和串口设置"></a>配置标签和串口设置</h4><p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211163925.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211170850.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211170908.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211170925.png"></p>
<ul>
<li>添加串口</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211170955.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171011.png"></p>
<ul>
<li>添加按键</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171025.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171047.png"></p>
<ul>
<li>代码段</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171238.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171303.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171317.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171330.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171345.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211171401.png"></p>
<ul>
<li>槽函数设置</li>
</ul>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211172036.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211172522.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211172536.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201211172553.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085653.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085707.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085727.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085740.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085753.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085807.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085820.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085833.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085850.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085901.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085912.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085923.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085934.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085946.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213085957.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213090008.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213090020.png"></p>
<p><img src="https://gitee.com/liangxinixn/blog002/raw/master/image01/20201213113612.png"></p>
<ul>
<li>测试</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">if(checked){
    ui-&gt;ledButton-&gt;setText("关闭小灯");//修改按钮上的文字信息
    bool ok = serial-&gt;open(QIODevice::ReadWrite);//以读的方式打开串口
    if(ok){
        QString cmd = "o";
        serial-&gt;write(cmd.toUtf8());
        QMessageBox::information(this,"提示","串口打开成功,点亮小灯成功");
        ui-&gt;ledButton-&gt;setText("关闭小灯");//修改按钮上的文字信息
    }else
        {
        QMessageBox::information(this,"提示","串口没有打开");
    }

}else{
    //QMessageBox::information(this,"提示","点击了按键");
    ui-&gt;ledButton-&gt;setText("打开小灯");//修改按钮上的文字信息
    if(serial-&gt;isOpen()){
        QString cmd = "c";
        serial-&gt;write(cmd.toUtf8());
        QMessageBox::information(this,"提示","串口打开成功,点亮小灯成功");
    }else
        {
        QMessageBox::information(this,"提示","串口打开失败");
    }
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>上位机控制小灯亮灭</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">void MainWindow::on_ledButton_clicked(bool checked)
{
    if(serial-&gt;isOpen()){
        if(checked){
            //o 打开
            QString cmd="o";
            serial-&gt;write(cmd.toUtf8());
            ui-&gt;ledButton-&gt;setText("关闭小灯");//修改按钮上的文字信息
            QMessageBox::information(this,"提示","点亮小灯成功");
        }else{
            QString cmd="c";
            serial-&gt;write(cmd.toUtf8());
            ui-&gt;ledButton-&gt;setText("打开小灯");//修改按钮上的文字信息
            QMessageBox::information(this,"提示","小灯关闭成功");
        }
    }else{
        QMessageBox::information(this,"提示","串口没有打开");
    }
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<ul>
<li>指纹测试</li>
</ul>
<pre class="line-numbers language-none"><code class="language-none">  /* USER CODE END WHILE */
status = HAL_UART_Receive(&amp;huart1,&amp;cmd,1,0xffff);
if(status == HAL_OK){
	if(cmd == 'e'){
		ret = requestEnterFingerPrint(8);
		if(ret == 0){//finger success
			printf("1");
		}else{//fail
			printf("2");
		}
}
  /* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>

                
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